JP2016113141A - Crash pad - Google Patents

Crash pad Download PDF

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Publication number
JP2016113141A
JP2016113141A JP2015216030A JP2015216030A JP2016113141A JP 2016113141 A JP2016113141 A JP 2016113141A JP 2015216030 A JP2015216030 A JP 2015216030A JP 2015216030 A JP2015216030 A JP 2015216030A JP 2016113141 A JP2016113141 A JP 2016113141A
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Japan
Prior art keywords
plasticizer
crash pad
foam
skin material
pad according
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Pending
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JP2015216030A
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Japanese (ja)
Inventor
コン、ビョン、ソク
Byung Seok Kong
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Hyundai Motor Co
Kia Corp
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Hyundai Motor Co
Kia Motors Corp
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Publication of JP2016113141A publication Critical patent/JP2016113141A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
    • B60R21/045—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings associated with the instrument panel or dashboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B32B5/20—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material foamed in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/14—Dashboards as superstructure sub-units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
    • B60R2021/0414—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings using energy absorbing ribs

Abstract

PROBLEM TO BE SOLVED: To provide a crash pad.SOLUTION: A crash pad according to the present invention contains a coating agent with a foaming layer surrounding a foam molecular, for preventing curing and contraction of a skin material, exposure of an airbag development line, degradation of the cold shock resisting property and the like, that are caused by that a plasticizer in the skin material is transferred to the foaming layer to decrease the content of the plasticizer in the skin material, and contains an interrupting film interposed between the skin material and the forming layer to prevent permeation of the plasticizer and combination of the plasticizer with the foam molecular.SELECTED DRAWING: Figure 10

Description

本発明は、クラッシュパッドに関するもので、より詳細には、表皮材の可塑剤が発泡層に転移されて表皮材の可塑剤の含量が低減することによる表皮材の硬化及び収縮、エアバッグの展開線の露出、低温衝撃性の低下などを防止するために、発泡層がフォーム分子を取り囲むコーティング剤を含み、表皮材と発泡層との間に介在される遮断膜を含むことで、可塑剤の浸透及びフォーム分子との結合を防止できるクラッシュパッドに関する。   The present invention relates to a crash pad, and more particularly, the hardening and shrinkage of a skin material due to the plasticizer of the skin material being transferred to a foamed layer and the content of the plasticizer in the skin material being reduced, and the development of an airbag. In order to prevent the exposure of the wire, the low-temperature impact resistance, etc., the foam layer includes a coating agent that surrounds the foam molecule, and includes a barrier film interposed between the skin material and the foam layer, The present invention relates to a crash pad that can prevent penetration and binding with foam molecules.

一般的に、自動車内の前方に設置される内蔵材であって、衝突事故などで乗客を安全に保護するために運転席及び助手席などの前方の内側にクラッシュパッド（ｃｒａｓｈ ｐａｄ）が設置される。   Generally, it is a built-in material that is installed in the front of an automobile, and a crash pad is installed inside the front of the driver's seat and passenger's seat to protect passengers safely in the event of a collision. The

このようなクラッシュパッドは、発泡材（フォーム（ｆｏａｍ）材）を用いて弾性的なクッション性能及びある程度の衝撃を吸収する機能に加えて、外見上きれいな表面状態を有するように製作される。   Such a crash pad is manufactured to have a clean surface condition in addition to an elastic cushion performance and a function of absorbing a certain amount of impact by using a foam material (foam material).

図１から図３を参照すると、通常、自動車用クラッシュパッドは、きれいな表面状態を提供するための表皮材（ｓｋｉｎ）３と、前記表皮材の内側でクラッシュパッドの骨組みの役割をする基材（ｃｏｒｅ）５と、で構成され、前記表皮材と基材との間にはクッション及び衝撃吸収の性能を提供するための発泡層７が介在される。   Referring to FIGS. 1 to 3, a crash pad for an automobile is generally composed of a skin material 3 for providing a clean surface state, and a base material that serves as a framework for the crash pad inside the skin material ( core) 5, and a foam layer 7 is interposed between the skin material and the base material to provide cushioning and shock absorbing performance.

前記表皮材３は、５０〜６０重量％のＰＶＣ３１と、３〜５重量％の顔料（添加剤）３３、３〜５重量％の乾燥剤３５、及び３５〜４０重量％の可塑剤３７を含む。前記可塑剤３７は、ソフト感、耐環境・耐衝撃性を向上させるために含まれる。   The skin material 3 includes 50 to 60% by weight of PVC 31, 3 to 5% by weight of a pigment (additive) 33, 3 to 5% by weight of a desiccant 35, and 35 to 40% by weight of a plasticizer 37. . The plasticizer 37 is included to improve soft feeling, environment resistance and impact resistance.

図３を参照すると、クラッシュパッドが製品化に向けた耐環境性仕様を満足するか否かを確認するための耐熱老化（１１０℃，３００ｈｒ）試験過程で可塑剤３７が発泡層７に転移されるという問題がわかる。耐熱老化過程で前記表皮材３に含まれている可塑剤３７が発泡層７に転移されて前記発泡層のフォーム分子７１と電気的結合（Ｂ）をするため、前記表皮材３の可塑剤３７の含量が減少するようになる。   Referring to FIG. 3, the plasticizer 37 is transferred to the foamed layer 7 in the heat aging (110 ° C., 300 hr) test process for confirming whether the crash pad satisfies the environmental resistance specification for commercialization. I understand the problem. In the heat aging process, the plasticizer 37 contained in the skin material 3 is transferred to the foamed layer 7 to be electrically coupled (B) with the foam molecules 71 of the foamed layer. Therefore, the plasticizer 37 of the skin material 3 is used. The content of becomes reduced.

前記可塑剤は、上述したように表皮材のソフト感及び耐環境性を向上させるためのものであり、前記可塑剤の減少につれて、図４に示すように表皮材の硬度が上昇して硬化し、図６に示すように表皮材が収縮してエアバッグラインなどが露出し、低温衝撃性が低下するなどの様々な問題が生じた。   As described above, the plasticizer is for improving the softness and environmental resistance of the skin material. As the plasticizer decreases, the hardness of the skin material increases and cures as shown in FIG. As shown in FIG. 6, various problems such as shrinkage of the skin material, exposure of the air bag line, and a decrease in low temperature impact resistance occurred.

したがって、表皮材の耐環境性などの問題を解決するために可塑剤の転移を根本的に防止する技術の開発が求められる。   Therefore, in order to solve problems such as the environmental resistance of the skin material, development of a technique for fundamentally preventing the transfer of the plasticizer is required.

韓国公開特許第１０−２０１１−８２９５２号Korean Published Patent No. 10-2011-82952 韓国登録特許第１０−１１４５１４０号Korean Registered Patent No. 10-1145140 韓国公開特許第１０−２００４−４２６７８号Korean Published Patent No. 10-2004-42678

本発明は、上記問題を解決するために案出されたもので、表皮材に含まれた可塑剤が発泡層に転移しないクラッシュパッドを提供することにその目的がある。   The present invention has been devised in order to solve the above problems, and has an object to provide a crash pad in which the plasticizer contained in the skin material does not transfer to the foamed layer.

また、本発明は、安全性に直結するエアバッグの展開線領域での可塑剤の転移を完全に遮断できるクラッシュパッドを提供することにその目的がある。   Another object of the present invention is to provide a crash pad that can completely block the transfer of the plasticizer in the deployment line region of the airbag that is directly linked to safety.

本発明の目的は、上述した目的に制限されることはなく、言及していない他の目的は下記記載によって当業者に明確に理解できるものである。   The object of the present invention is not limited to the above-described object, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

本発明は、以下の構成を含む。   The present invention includes the following configurations.

本発明によるクラッシュパッドは、可塑剤を含み、成形空間を形成する表皮材と、前記成形空間に発泡液を注入して発泡成形される発泡層と、を含み、前記発泡層は発泡成形により形成されるフォーム分子と、前記フォーム分子を取り囲んで前記可塑剤が前記発泡層に転移されることを防止するコーティング剤と、を含むことを特徴とする。   The crash pad according to the present invention includes a skin material that includes a plasticizer and forms a molding space, and a foam layer that is foam-molded by injecting a foaming liquid into the molding space, and the foam layer is formed by foam molding. And a coating agent that surrounds the foam molecule and prevents the plasticizer from being transferred to the foamed layer.

本発明の好ましい実施例において、前記コーティング剤は前記可塑剤と逆の極性を有することを特徴とする。   In a preferred embodiment of the present invention, the coating agent has a polarity opposite to that of the plasticizer.

本発明の好ましい実施例において、前記コーティング剤は前記可塑剤と同じ素材を用いたものであることを特徴とする。   In a preferred embodiment of the present invention, the coating agent is the same material as the plasticizer.

本発明によるクラッシュパッドは、前記表皮材と前記発泡層との間に介在されて前記可塑剤が前記発泡層に転移されることを防止する遮断膜をさらに含むことを特徴とする。   The crash pad according to the present invention further includes a barrier film interposed between the skin material and the foam layer to prevent the plasticizer from being transferred to the foam layer.

本発明の好ましい実施例において、前記遮断膜はＴＰＯであることを特徴とする。   In a preferred embodiment of the present invention, the barrier film is TPO.

本発明の好ましい実施例において、前記遮断膜はフォーム分子が侵入するように貫通形成された複数の微細孔を含み、前記微細孔は１．５〜２．０ｍｍの直径を有することを特徴とする。   In a preferred embodiment of the present invention, the barrier film includes a plurality of micropores formed so as to penetrate the foam molecules, and the micropores have a diameter of 1.5 to 2.0 mm. .

本発明の好ましい実施例において、前記遮断膜は前記表皮材のエアバッグの展開線と一致するように形成された分離線を含み、前記分離線を基準として前記分離線の周辺に１０〜２０ｍｍの幅で形成されることを特徴とする。   In a preferred embodiment of the present invention, the barrier film includes a separation line formed so as to coincide with a deployment line of an air bag of the skin material, and is 10 to 20 mm around the separation line based on the separation line. It is characterized by being formed with a width.

本発明の好ましい実施例において、前記微細孔は前記分離線から５０〜７０ｍｍ離れた位置に形成されることを特徴とする。   In a preferred embodiment of the present invention, the micro hole is formed at a position 50 to 70 mm away from the separation line.

本発明の好ましい実施例において、前記遮断膜は、一面に両面テープが付着されて前記両面テープにより前記表皮材の内側に接着され、前記両面テープはＰＶＣフィルムであり、１００〜１１０℃で９００〜１０００時間後にも７０〜１００％の接着力を維持することを特徴とする。   In a preferred embodiment of the present invention, the barrier film has a double-sided tape attached to one side and is adhered to the inside of the skin material by the double-sided tape, and the double-sided tape is a PVC film, and is 900 to 100 to 110 ° C. The adhesive strength of 70 to 100% is maintained even after 1000 hours.

本発明によるクラッシュパッドは次のような効果を有する。   The crash pad according to the present invention has the following effects.

本発明は、発泡層が可塑剤と逆の極性を有するコーティング剤を含むことで、可塑剤の浸透を未然に防止することができる。   In the present invention, since the foam layer contains a coating agent having a polarity opposite to that of the plasticizer, the penetration of the plasticizer can be prevented in advance.

本発明は、前記コーティング剤がフォーム分子を取り囲むことで、前記可塑剤とフォーム分子が電気的に結合できないようにする。   The present invention prevents the plasticizer and the foam molecule from being electrically bonded by surrounding the foam molecule with the coating agent.

本発明は、遮断膜を含むことで、物理的な方法で可塑剤の転移を完全に遮断することができる。   By including the barrier film, the present invention can completely block the transfer of the plasticizer by a physical method.

本発明は、遮断膜が微細孔を含むことで、前記微細孔でフォーム分子が浸透できるため、表皮材と発泡層の接着力が減少しない効果がある。   In the present invention, since the barrier film includes micropores, foam molecules can penetrate through the micropores, and therefore, the adhesive force between the skin material and the foam layer is not reduced.

本発明は、エアバッグの展開線領域での可塑剤の転移を完全に遮断（遮断率９８％以上）することで、表皮材の収縮が起こらず、乗員の安全性が向上させることができる。   In the present invention, the transfer of the plasticizer in the deployment line region of the airbag is completely blocked (blocking rate is 98% or more), so that the skin material does not shrink and the safety of the occupant can be improved.

従来のクラッシュパッドを示す図面である。2 is a diagram illustrating a conventional crash pad. 従来のクラッシュパッドの表皮材の構成要素を示す図面である。It is drawing which shows the component of the skin material of the conventional crash pad. 図１のＡＡ線の断面を示す図面である。It is drawing which shows the cross section of the AA line of FIG. 可塑剤の含量によるクラッシュパッドの硬度を示すグラフである。It is a graph which shows the hardness of the crush pad by the content of a plasticizer. 本発明によるクラッシュパッドのコーティング剤による可塑剤の転移を防止することを説明するための図面である。3 is a view for explaining prevention of transfer of a plasticizer by a coating agent for a crash pad according to the present invention. 従来のクラッシュパッドと本発明によるクラッシュパッドの耐熱老化試験の結果を示す図面である。3 is a view showing a result of a heat aging test of a conventional crash pad and a crash pad according to the present invention. 従来のクラッシュパッドと本発明によるクラッシュパッドの耐熱老化試験過程において、引張時の応力及び可塑剤の含量を示すグラフである。6 is a graph showing stress and plasticizer content during tension in a heat aging test process of a conventional crash pad and a crash pad according to the present invention. 本発明によるクラッシュパッドのエアバッグの展開線を示す図面である。3 is a drawing showing a deployment line of an airbag of a crash pad according to the present invention. 本発明の遮断膜を示す図面である。It is drawing which shows the barrier film of this invention. 本発明によるクラッシュパッドの遮断膜による可塑剤の転移を防止することを説明するための図面である。3 is a view for explaining prevention of transfer of a plasticizer by a barrier film of a crash pad according to the present invention. 本発明による遮断膜を表皮材に接着する過程を説明するための図面である。3 is a view for explaining a process of bonding a barrier film to a skin material according to the present invention.

以下、添付した図面を参照して本発明の好ましい実施例について本発明が属する技術分野で通常の知識を有する者が容易に実施するように詳細に説明する。ただし、本発明の実施例を説明するに当たって、公知機能または構成に関する具体的な説明が本発明の要旨をかえって不明にすると判断される場合はその詳細な説明を省略する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, in the description of the embodiments of the present invention, when it is determined that a specific description regarding a known function or configuration is unclear, the detailed description thereof will be omitted.

本発明によるクラッシュパッドは、基材と、発泡層が形成されるように成形空間を含む表皮材と、前記成形空間に発泡液を注入して発泡成形される発泡層と、を含む。   The crash pad according to the present invention includes a base material, a skin material including a molding space so that the foam layer is formed, and a foam layer that is foam-molded by injecting a foaming liquid into the molding space.

前記クラッシュパッドは、金型（図示せず）に表皮材と基材を挿入した後、成形空間（図示せず）に発泡液を注入して前記金型を圧着して製造される。したがって、前記クラッシュパッドは下側から基材、発泡層、表皮材が積層された構造を有する。   The crash pad is manufactured by inserting a skin material and a base material into a mold (not shown) and then injecting a foaming liquid into a molding space (not shown) to press the mold. Therefore, the crash pad has a structure in which a base material, a foam layer, and a skin material are laminated from below.

前記基材は、クラッシュパッドの骨組みの役割をし、従来のクラッシュパッドに用いられた基材とその構成、機能などが同一であるため、これに関する詳しい説明は省略する。   Since the base material serves as a framework for the crash pad and has the same configuration and function as the base material used in the conventional crash pad, detailed description thereof will be omitted.

図５を参照すると、前記表皮材は、ＰＶＣ（Ｐｏｌｙｖｉｎｙｌ ｃｈｌｏｒｉｄｅ）１３１、顔料（添加剤）１３３、乾燥剤１３５、及び可塑剤１３７を含むことができる。   Referring to FIG. 5, the skin material may include PVC (Polyvinyl Chloride) 131, a pigment (additive) 133, a desiccant 135, and a plasticizer 137.

前記可塑剤１３７は、表皮材１３のソフト感、耐環境性・耐衝撃性を向上させるもので、トリメリテート系またはＴＯＴＭ（Ｔｒｉｏｃｔｙｌ ｔｒｉｍｅｌｌｉｔａｔｅ）系可塑剤などを使用することができる。上述したように、従来のクラッシュパッドは、耐熱老化試験過程で可塑剤が発泡層に転移されて表皮材の可塑剤の含量が減少して表皮材の物性が低減するという問題があった。   The plasticizer 137 improves the soft feeling, environmental resistance, and impact resistance of the skin material 13, and a trimellitate or TOTM (Trictyl trimellitate) plasticizer can be used. As described above, the conventional crash pad has a problem that the plasticizer is transferred to the foamed layer during the heat aging test process, the plasticizer content of the skin material is reduced, and the physical properties of the skin material are reduced.

前記発泡層１５は、発泡液のポリウレタン（Ｐｏｌｙｕｒｅｔｈａｎｅ、以下「ＰＵ」）液を発泡反応して形成されるが、この過程で前記ＰＵ液はフォーム分子１５１からなる。前記フォーム分子１５１は、フォームの形状の特性上、空いた空間がたくさん存在するため、前記発泡層１５に可塑剤１３７が転移されると、前記空いた空間に電気的に結合するようになる。本発明では、説明の便宜のために、前記フォーム分子１５１を図５に示すような形状にしたが、フォーム分子１５１の形状がこれに限定されることはない。   The foamed layer 15 is formed by foaming a polyurethane (Polyurethane, hereinafter referred to as “PU”) liquid, and in this process, the PU liquid is composed of foam molecules 151. Since the foam molecules 151 have many vacant spaces due to the shape characteristics of the foam, when the plasticizer 137 is transferred to the foamed layer 15, the foam molecules 151 are electrically coupled to the vacant spaces. In the present invention, the foam molecules 151 are shaped as shown in FIG. 5 for convenience of explanation, but the shape of the foam molecules 151 is not limited to this.

本発明の一実施例によるクラッシュパッドにおいて、前記発泡層１５は、可塑剤１３７の転移を防止するコーティング剤１５３を含むことができる。   In the crash pad according to an embodiment of the present invention, the foam layer 15 may include a coating agent 153 that prevents the plasticizer 137 from transferring.

前記コーティング剤１５３は前記ＰＵ液に添加されるが、前記ＰＵ液から前記フォーム分子１５１が形成される時、前記フォーム分子１５１を取り囲むことができる（Ｃ）。   The coating agent 153 is added to the PU liquid. When the foam molecules 151 are formed from the PU liquid, the coating agent 153 can surround the foam molecules 151 (C).

前記コーティング剤１５３は、前記フォーム分子１５１を取り囲んで（Ｃ）いるため、上述したようなフォーム分子１５１と可塑剤１３７の電気的結合を遮断することができる。   Since the coating agent 153 surrounds the foam molecule 151 (C), the electrical bond between the foam molecule 151 and the plasticizer 137 can be blocked.

前記コーティング剤１５３は、前記フォーム分子１５１と前記可塑剤１３７の結合を防止するものであれば何れもよいが、好ましくは前記可塑剤１３７と逆の極性を帯びる素材が挙げられる。したがって、逆の極性同士は混合しない特性を用いて前記可塑剤１３７が発泡層１５に浸透し難くなる。   The coating agent 153 may be any material that prevents the bonding between the foam molecules 151 and the plasticizer 137, and a material having a polarity opposite to that of the plasticizer 137 is preferable. Therefore, it becomes difficult for the plasticizer 137 to penetrate into the foamed layer 15 using the characteristic that the opposite polarities are not mixed.

また、前記コーティング剤１５３に前記可塑剤と同じ素材を用いて予め前記フォーム分子１５１と結合することで、前記表皮材１３から前記発泡層１５に転移される可塑剤１３７が前記フォーム分子１５１と結合できないようにして前記可塑剤１３７の転移を防止してもよい。   In addition, by using the same material as the plasticizer for the coating agent 153 and bonding with the foam molecules 151 in advance, the plasticizer 137 transferred from the skin material 13 to the foam layer 15 is bonded with the foam molecules 151. The plasticizer 137 may be prevented from transferring.

測定例
前記コーティング剤によって可塑剤の転移を遮断したか否かを確認するために前記ＰＵ液にコーティング剤（前記可塑剤と同じ素材であって、トリメリテート系可塑剤を使用）を添加してクラッシュパッドを製造し、物性を測定した。 Measurement example Crash by adding a coating agent (same material as the plasticizer and using trimellitate plasticizer) to the PU liquid to confirm whether the coating agent blocked the transfer of the plasticizer A pad was manufactured and the physical properties were measured.

図６は、既存のクラッシュパッドと本発明による改善したクラッシュパッドに対して１２０℃で５０日間（１２００時間）の耐熱老化試験を行った結果を示す図面である。   FIG. 6 is a diagram showing the results of a heat aging test conducted at 120 ° C. for 50 days (1200 hours) on an existing crash pad and an improved crash pad according to the present invention.

既存のクラッシュパッドは、可塑剤の転移による表皮材の表面硬化及び収縮があったが、本発明による改善したクラッシュパッドは、初期の物性値を維持しているため、可塑剤の転移が遮断されたことを確認することができる。   The existing crush pad had surface hardening and shrinkage of the skin material due to the plasticizer transfer, but the improved crush pad according to the present invention maintains the initial physical property values, so that the plasticizer transfer is blocked. Can be confirmed.

図７の（ａ）は、１２０℃で５０日間（１２００時間）の耐熱老化を行う過程で既存のクラッシュパッドと本発明による改善したクラッシュパッドを５０％引っ張った時の応力を測定したグラフで、図７の（ｂ）は、耐熱老化を行う過程で、それぞれの表皮材の試片における可塑剤の含量を測定したグラフである。   (A) of FIG. 7 is a graph obtained by measuring the stress when 50% of the existing crash pad and the improved crash pad according to the present invention were pulled in the process of heat aging at 120 ° C. for 50 days (1200 hours). FIG. 7B is a graph in which the plasticizer content in each specimen of the skin material is measured in the process of heat aging.

図７の（ａ）を参照すると、既存のクラッシュパッドは、耐熱老化につれて可塑剤が転移されて引張強度が大きく変わるが、本発明による改善したクラッシュパッドは、初期の物性値を維持しているため、可塑剤の転移が遮断されたことを確認することができる。   Referring to (a) of FIG. 7, the existing crush pad has a large change in tensile strength as the plasticizer is transferred with heat aging, but the improved crush pad according to the present invention maintains the initial physical property values. Therefore, it can be confirmed that the transfer of the plasticizer is blocked.

図７の（ｂ）を参照すると、既存のクラッシュパッドは、耐熱老化につれて表皮材の可塑剤の含量が持続的に減少するが、本発明による改善したクラッシュパッドは、初期の含量に比べて９０％以上の可塑剤の含量を維持しているため、可塑剤の転移がほぼ起こらなかったことを定量的に確認することができる。   Referring to FIG. 7 (b), the existing crush pad has a continuous decrease in the plasticizer content of the skin material with heat aging, but the improved crush pad according to the present invention has 90% of the initial content. Since the plasticizer content of at least% is maintained, it can be quantitatively confirmed that almost no plasticizer transfer occurred.

本発明の他の実施例によるクラッシュパッドは、前記表皮材と発泡層との間に介在されて前記可塑剤の転移を防止する遮断膜１７を含むことができる。   The crash pad according to another embodiment of the present invention may include a barrier film 17 interposed between the skin material and the foam layer to prevent the plasticizer from transferring.

図８を参照すると、車両用クラッシュパッドは、その内側にエアバッグ（図示せず）が位置するため、事故などが発生してエアバッグが作動しなければならない場合にエアバッグが広がるようにエアバッグの展開線（Ｄ）という一種の隙間を含む。   Referring to FIG. 8, since the airbag (not shown) is located inside the crash pad for a vehicle, the airbag is spread so that the airbag spreads when an accident or the like needs to be activated. It includes a kind of gap called a development line (D) of the bag.

従来のクラッシュパッドは、耐環境条件（１１０℃、１０００時間）で可塑剤の転移によって表皮材が収縮してエアバッグの展開線領域の表面が変形する虞があるため、乗員の安全上の問題があった。   The conventional crash pad is a safety problem for passengers because the surface of the airbag may be deformed due to the shrinkage of the skin material due to the transfer of the plasticizer under environmental resistance (110 ° C, 1000 hours). was there.

したがって、本発明では、エアバッグの展開線領域で可塑剤を安全に遮断するために図９に示すような遮断膜１７を含む。   Therefore, the present invention includes a blocking film 17 as shown in FIG. 9 in order to safely block the plasticizer in the airbag deployment line region.

前記遮断膜１７は、耐環境性に優れたＴＰＯ（Ｔｈｅｒｍｏｐｌａｓｔｉｃ ｏｌｅｆｉｎ）材質を用いることが好ましい。   The barrier film 17 is preferably made of a TPO (Thermoplastic olefin) material having excellent environmental resistance.

前記遮断膜１７は、前記表皮材と発泡層との間に介在される構成であるため、表皮材と発泡層の接着力と共に可塑剤の転移の遮断効率を考慮して０．２〜０．５ｍｍ、好ましくは０．３ｍｍの厚さを有することができる。   Since the barrier film 17 is configured to be interposed between the skin material and the foamed layer, the barrier film 17 and the foamed layer have an adhesive force of 0.2 to 0. It can have a thickness of 5 mm, preferably 0.3 mm.

図９を参照すると、前記遮断膜１７は、エアバッグの展開線と一致するように切開された分離線１７１を含むことができる。前記分離線及びエアバッグの展開線は、後述するように、エアバッグの展開線の加工（Ｃｏｌｄ ｋｎｉｆｅ）によって形成される。   Referring to FIG. 9, the barrier film 17 may include a separation line 171 that is cut to coincide with a deployment line of the airbag. The separation line and the airbag deployment line are formed by processing the airbag deployment line (Cold Knife), as will be described later.

前記遮断膜１７は、前記分離線１７１を基準として両側に１０〜２０ｍｍの幅（Ｅ、Ｅ’）を有する形状に製造される。好ましくは、前記分離線１７１を中心として両側に一定の幅（Ｅ、Ｅ’）を有するように製造される。   The blocking film 17 is manufactured in a shape having a width (E, E ′) of 10 to 20 mm on both sides with respect to the separation line 171. Preferably, it is manufactured to have a certain width (E, E ′) on both sides with the separation line 171 as the center.

図９及び図１０を参照すると、前記遮断膜１７は、フォーム分子１５１が侵入するように貫通形成された複数の微細孔１７３を含むことができる。上述したように、成形空間に発泡液を注入した後、表皮材と基材を金型で圧着する時、発泡層と表皮材が接着しなければならないが、遮断膜１７がその間に介在されているため、両構成要素の接着力が低減する虞がある。   Referring to FIGS. 9 and 10, the blocking layer 17 may include a plurality of micropores 173 that are formed to penetrate the foam molecules 151. As described above, after injecting the foaming liquid into the molding space, when the skin material and the base material are pressure-bonded with a mold, the foam layer and the skin material must be bonded, but the blocking film 17 is interposed therebetween. Therefore, there is a possibility that the adhesive force between the two components is reduced.

したがって、本発明では、前記遮断膜１７にフォーム分子１５１が侵入できる微細孔１７３を形成することによって、可塑剤１３７の転移を防止する共に表皮材と発泡層の接着力の低下を防止することができる。   Therefore, in the present invention, by forming the micropores 173 into which the foam molecules 151 can enter the blocking film 17, it is possible to prevent the plasticizer 137 from being transferred and to prevent the adhesion between the skin material and the foam layer from being lowered. it can.

前記微細孔１７３は、前記遮断膜において、いずれの形状、いずれの位置に形成されてもよいが、表皮材と発泡層の均一な接着及び接着力の増大のために、１．５〜２．０ｍｍの直径で、前記分離線１７１から５０〜７０ｍｍ離れた位置に形成されることが好ましい。   The micropores 173 may be formed in any shape and any position in the blocking film, but in order to achieve uniform adhesion between the skin material and the foamed layer and an increase in the adhesive force, 1.5-2. A diameter of 0 mm is preferably formed at a position separated from the separation line 171 by 50 to 70 mm.

図１０を参照すると、本発明によるクラッシュパッドは、前記遮断膜１７を含むことで、可塑剤の転移を物理的な方法で遮断すると共に、前記可塑剤１３７と逆の極性を有するコーティング剤１５３がフォーム分子１５１を取り囲むことで、可塑剤１３７の浸透及びフォーム分子１５１への結合を難しくするため、可塑剤１３７の転移を９８％以上遮断することができる。   Referring to FIG. 10, the crash pad according to the present invention includes the barrier layer 17 to block the plasticizer from being transferred by a physical method, and the coating agent 153 having a polarity opposite to that of the plasticizer 137 is provided. Surrounding the foam molecule 151 makes it difficult for the plasticizer 137 to penetrate and bond to the foam molecule 151, so that the transition of the plasticizer 137 can be blocked by 98% or more.

図１１を参照すると、本発明によるクラッシュパッドは、前記遮断膜を前記表皮材の内側に接着し、エアバッグの展開線を加工し、上述したように成形空間にコーティング剤を含む発泡液を注入して発泡層を成形することで製造される。   Referring to FIG. 11, in the crash pad according to the present invention, the barrier film is bonded to the inside of the skin material, the deployment line of the airbag is processed, and the foaming liquid containing the coating agent is injected into the molding space as described above. Then, it is manufactured by forming a foamed layer.

したがって、前記遮断膜を表皮材に接着するために、前記遮断膜は一面に耐環境性の両面テープ（図示せず）が付着されることができる。   Therefore, in order to adhere the barrier film to the skin material, an environmental resistant double-sided tape (not shown) can be attached to the barrier film.

前記両面テープは、耐熱老化過程（１２０℃で５０日）を経ても前記表皮材の正確な位置に接着しなければならないものである。接着力が低下して遮断膜の位置がずれると、エアバッグの展開線と分離線が一致しなくなって安全上の危険を生むことがあり、遮断膜の脱着によって表皮材と発泡層の結合力も低減することがあるからである。   The double-sided tape must be adhered to an accurate position of the skin material even after a heat aging process (at 120 ° C. for 50 days). If the adhesion force decreases and the position of the barrier film shifts, the deployment line of the airbag and the separation line may not match, creating a safety risk. This is because it may be reduced.

したがって、前記両面テープは、１１０℃で１０００時間後にも接着力が７０％以上維持される条件を満足するＰＶＣフィルムにすることができる。   Therefore, the double-sided tape can be a PVC film that satisfies the condition that the adhesive strength is maintained at 70% or more even after 1000 hours at 110 ° C.

本発明によるクラッシュパッドは、発泡層が可塑剤と逆の極性を有するコーティング剤を含むか、可塑剤と同じ素材のコーティング剤を含むことで、可塑剤の浸透及びフォーム分子との結合を難しくすることによって可塑剤の転移を防止することができる。   The crash pad according to the present invention makes it difficult to penetrate the plasticizer and bond with the foam molecules by including a coating agent having a foam layer having a polarity opposite to that of the plasticizer or a coating agent made of the same material as the plasticizer. This can prevent the plasticizer from transferring.

また、本発明によるクラッシュパッドは、前記表皮材と発泡層との間に介在される遮断膜を含むことで、物理的な方法で可塑剤の転移を防止することができる。   In addition, the crash pad according to the present invention includes a barrier film interposed between the skin material and the foam layer, thereby preventing the plasticizer from being transferred by a physical method.

したがって、本発明によるクラッシュパッドは、可塑剤の転移を９８％以上遮断することによって、表皮材の硬化、エアバッグの展開線の露出、低温衝撃性の低下という問題を解決することができる。   Therefore, the crash pad according to the present invention can solve the problems of hardening the skin material, exposing the deployment line of the airbag, and lowering the low temperature impact property by blocking the transfer of the plasticizer by 98% or more.

以上、本発明の実施例について詳細に説明したが、本発明の権利範囲は上述した実施例に限定されることはなく、次の特許請求の範囲で定義する本発明の基本概念を用いた当業者の様々な変形及び改良形態も本発明の権利範囲に属する。   Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited to the above-described embodiments, and the basic concept of the present invention defined in the following claims is used. Various modifications and improvements of the traders are also within the scope of the present invention.

１ クラッシュパッド
１１ 基材
１３ 表皮材
１３１ ＰＶＣ
１３３ 顔料（添加剤）
１３５ 乾燥剤
１３７ 可塑剤
１５ 発泡層
１５１ フォーム分子
１５３ コーティング剤
１７ 遮断膜
１７１ 分離線
１７３ 微細孔
Ａ エアバッグの展開線 DESCRIPTION OF SYMBOLS 1 Crash pad 11 Base material 13 Skin material 131 PVC
133 Pigment (additive)
135 Desiccant 137 Plasticizer 15 Foam Layer 151 Foam Molecule 153 Coating Agent 17 Barrier Membrane 171 Separation Line 173 Micropore A Airbag Deployment Line

Claims (14)

可塑剤を含み、成形空間を形成する表皮材と、前記成形空間に発泡液を注入して発泡成形される発泡層と、を含み、
前記発泡層は、発泡成形により形成されるフォーム分子と、前記フォーム分子を取り囲んで前記可塑剤が前記発泡層に転移されることを防止するコーティング剤と、を含むことを特徴とするクラッシュパッド。 A skin material that includes a plasticizer and forms a molding space, and a foam layer that is foam-molded by injecting a foaming liquid into the molding space,
The crash pad, wherein the foam layer includes foam molecules formed by foam molding, and a coating agent that surrounds the foam molecules and prevents the plasticizer from being transferred to the foam layer. 前記コーティング剤は、前記可塑剤と逆の極性を有することを特徴とする請求項１に記載のクラッシュパッド。   The crash pad according to claim 1, wherein the coating agent has a polarity opposite to that of the plasticizer. 前記コーティング剤は、前記可塑剤と同じ素材を用いたものであることを特徴とする請求項１に記載のクラッシュパッド。   The crash pad according to claim 1, wherein the coating agent is made of the same material as the plasticizer. 前記表皮材と前記発泡層との間に介在されて前記可塑剤が前記発泡層に転移されることを防止する遮断膜をさらに含むことを特徴とする請求項１から３の何れか１項に記載のクラッシュパッド。   The barrier film according to any one of claims 1 to 3, further comprising a barrier film interposed between the skin material and the foam layer to prevent the plasticizer from being transferred to the foam layer. The listed crash pad. 前記遮断膜はＴＰＯであることを特徴とする請求項４に記載のクラッシュパッド。   The crash pad according to claim 4, wherein the barrier film is TPO. 前記遮断膜は、フォーム分子が侵入するように貫通形成された複数の微細孔を含むことを特徴とする請求項４に記載のクラッシュパッド。   5. The crash pad according to claim 4, wherein the barrier film includes a plurality of micropores formed so as to penetrate through foam molecules. 前記微細孔は１．５〜２．０ｍｍの直径を有することを特徴とする請求項６に記載のクラッシュパッド。   The crash pad according to claim 6, wherein the micro holes have a diameter of 1.5 to 2.0 mm. 前記遮断膜は、前記表皮材のエアバッグの展開線と一致するように形成された分離線を含むことを特徴とする請求項４に記載のクラッシュパッド。   The crash pad according to claim 4, wherein the barrier film includes a separation line formed to coincide with a deployment line of the airbag of the skin material. 前記遮断膜は、前記分離線を基準として前記分離線の周辺に１０〜２０ｍｍの幅で形成されることを特徴とする請求項８に記載のクラッシュパッド。   The crash pad according to claim 8, wherein the barrier film is formed with a width of 10 to 20 mm around the separation line with the separation line as a reference. 前記遮断膜は、フォーム分子が侵入するように貫通形成された複数の微細孔を含むことを特徴とする請求項９に記載のクラッシュパッド。   The crashpad according to claim 9, wherein the barrier film includes a plurality of micropores formed so as to penetrate the foam molecules. 前記微細孔は、前記分離線から５０〜７０ｍｍ離れた位置に形成されることを特徴とする請求項１０に記載のクラッシュパッド。   The crash pad according to claim 10, wherein the fine hole is formed at a position 50 to 70 mm away from the separation line. 前記遮断膜は、一面に両面テープが付着され、前記両面テープにより前記表皮材の内側に接着されることを特徴とする請求項４に記載のクラッシュパッド。   The crash pad according to claim 4, wherein the barrier film has a double-sided tape attached to one surface, and is adhered to the inside of the skin material by the double-sided tape. 前記両面テープはＰＶＣフィルムであることを特徴とする請求項１２に記載のクラッシュパッド。   The crush pad according to claim 12, wherein the double-sided tape is a PVC film. 前記両面テープは、１００〜１１０℃で９００〜１０００時間後にも７０〜１００％の接着力を維持することを特徴とする請求項１３に記載のクラッシュパッド。   The crashpad according to claim 13, wherein the double-sided tape maintains an adhesive force of 70 to 100% even after 900 to 1000 hours at 100 to 110 ° C.
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